Deprecate `ConfigFileApplicationListener` and provide a replacement
mechanism that supports arbitrary config data imports.
This commit updates the following areas:
- Extract `EnvironmentPostProcessor` invocation logic from the
`ConfigFileApplicationListener` to new dedicated listener. Also
providing support for `Log` injection.
- Extract `RandomPropertySource` adding logic from the
`ConfigFileApplicationListener` to a dedicated class.
- Migrate to the recently introduced `DefaultPropertiesPropertySource`
class when moving the defaultProperties `PropertySource`
- Replace processing logic with a phased approach to ensure that
profile enablement happens in a distinct phase and that profiles
can no longer be activated on an ad-hoc basis.
- Provide a more predictable and logical import order for processing
`application.properties` and `application.yml` files.
- Add support for a `spring.config.import` property which can be used
to import additional config data. Also provide a pluggable API
allowing third-parties to resolve and load locations themselves.
- Add `spring.config.activate.on-profile` support which replaces the
existing `spring.profiles` property.
- Add `spring.config.activate.on-cloud-platform` support which allows
a config data document to be active only on a given cloud platform.
- Support a `spring.config.use-legacy-processing` property allowing the
previous processing logic to be used.
Closes gh-22497
Co-authored-by: Madhura Bhave <mbhave@vmware.com>
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